Reliable spectroscopic, photometric and astrometric data are important for understanding the structure, formation and evolution of our Galaxy. Today, sky surveys are systematically carried out in a wide range of the electromagnetic spectrum from X-rays to the radio. In some sky surveys such as ROSAT [1]}, GALEX [2]}, and SDSS [3]} which are carried out between the X-ray and optical regions of the electromagnetic spectrum, the interstellar absorption prevents to obtain accurate magnitude and colours. However, this problem has been overcame by means of the sky surveys which are defined over the infrared region of the star spectrum, i.e. 2MASS [4]}, UKIDSS [5]}, VVV [6]}, VISTA [7]}, WISE [8]}, and AKARI [9]}. Thus, considerable information have been obtained, especially on the bulge, bar structure and Galactic stellar warp in our Galaxy [10]}, [11]}, [12]}, [13]}, [14]}.
